CN210053359U - Rollback inhibition type inertia piezoelectric linear driver - Google Patents
Rollback inhibition type inertia piezoelectric linear driver Download PDFInfo
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- CN210053359U CN210053359U CN201921018801.5U CN201921018801U CN210053359U CN 210053359 U CN210053359 U CN 210053359U CN 201921018801 U CN201921018801 U CN 201921018801U CN 210053359 U CN210053359 U CN 210053359U
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- piezoelectric bimorph
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Abstract
The utility model relates to a backspace suppression formula inertia piezoelectricity linear actuator belongs to piezoelectricity precision drive technical field. The first piezoelectric bimorph and the second piezoelectric bimorph are fixed on the base through bolts, nuts and clamping blocks, wherein the first piezoelectric bimorph and the second piezoelectric bimorph, the base and the clamping blocks form two-end fixed and asymmetric clamping, the base is arranged on a guide rail, and the first piezoelectric bimorph and the second piezoelectric bimorph are arranged in parallel. The utility model discloses an advantage is simple structure, and the piezoelectric bimorph adopts the asymmetric centre gripping of both ends branch, can reach the purpose that the driver did not have when moving back under the cooperation of two signals.
Description
Technical Field
The utility model belongs to the technical field of piezoelectricity precision drive.
Background
In recent years, with the rapid development of micro-nano technology, the driving technology requirements for micro-machines in the technical fields of biomedicine, precision machinery, micro-robots, computers, automatic control, precision measurement, precision devices, ultra-precision machining and the like are higher and higher. The micro-nano level driving technology has become a hot spot of wide attention at home and abroad as a core technology for exploring the micro field. The traditional driving mode of precision machinery generally adopts a mechanical structure, such as a lead screw pair, a rolling guide rail, a sliding guide rail, a precision spiral wedge mechanism and the like in a precision lathe, and even if the mechanical structure with ultrahigh precision still has the problems of clearance, friction, crawling and the like, so that the precision level obtained by the mechanical structure is difficult to improve, and a plurality of novel driving modes, such as an electrostatic attraction mode, an electromagnetic mode, a magnetostriction mode, a shape memory alloy mode, a piezoelectric mode and the like, are developed under the condition. Piezoelectric ceramics is a functional material widely used in the field of precision driving, and has the advantages of low power consumption, no electromagnetic interference, high response speed, and the like, and a driver using piezoelectric materials as driving elements becomes an important branch of precision driving devices in recent years.
In recent years, piezoelectric precision driving apparatuses have been widely studied. The inertial driver has a simple mechanical structure, high movement speed and easy control of a driving mode, can realize continuous movement with a large stroke, can stably work in a high-frequency state, and becomes a hot spot of domestic and foreign research in recent years.
The working mechanism of the currently developed mechanical control type inertia piezoelectric actuator is to obtain force difference driving motion through an asymmetric mechanical structure, and the actuator usually has a backspacing phenomenon in the motion process, so that the driving efficiency is reduced. In order to solve the problem of backspacing, the utility model provides a backspacing suppression formula inertia piezoelectricity linear actuator. The symmetrical square wave electric signal I is used as a driving excitation signal and applied to the first piezoelectric bimorph, the symmetrical square wave electric signal II is used as a backspacing suppression signal and applied to the second piezoelectric bimorph, and no backspacing is generated when the driver operates through the cooperation of the two signals.
Disclosure of Invention
The utility model provides a fall back suppression formula inertia piezoelectricity linear actuator utilizes two different square wave signals to apply respectively in two bimorphs to reach and eliminate the mesh that rolls back.
The utility model adopts the technical proposal that: the utility model relates to a backspace suppression formula inertia piezoelectricity linear actuator passes through bolt one (2), two, three, four with piezoelectricity bimorph one (3), piezoelectricity bimorph two (5), on nut one (1), two, three, four and grip block one (4), two, three, four are fixed in base (6), wherein piezoelectricity bimorph one (3), piezoelectricity bimorph two (5) and base (6) and grip block one (4), two, three, four form both ends and prop up asymmetric centre gripping admittedly, base (6) are arranged in on guide rail (7).
The minimum force of the base capable of overcoming the friction forward motion is F
mAt this time, F
mMaximum friction provided for the guide rail; when the excitation voltage is positive, the piezoelectric bimorph bends to the short clamping side, and an inertia force F in the opposite direction (towards the long clamping side) is generated
1(ii) a When the excitation voltage is negative, the piezoelectric bimorph bends toward the long clamping side, and an inertia force F in the opposite direction (toward the short clamping side) is generated
2. When F is present
1＞F
2＞F
mBase is at F
1Under the action of the elastic piece, the elastic piece moves forward one step; when F is present
2When acting, due to F
2＞F
mThe base will move backwards a small step and therefore the driver will move forwards and a back-off will occur. In order to eliminate backspacing, a second signal (the phase difference between the first signal and the second signal is a half cycle) is applied to the second piezoelectric bimorph, and when the first piezoelectric bimorph is excited by the first signal, an inertia force F is generated
2When the piezoelectric bimorph II is excited by the signal II, the inertia force F is generated
3(F
3And F
2Equal in magnitude and opposite in direction), under the cooperative action of the two signals, the purpose of eliminating the backspacing can be achieved.
When the first piezoelectric bimorph generates a backward inertial force under the excitation of the first signal, the second piezoelectric bimorph generates a forward inertial force under the excitation of the second signal, so that the generation of backspacing is eliminated, and the aim of no backspacing when the driver operates is achieved.
The utility model has the advantages that simple structure, the piezoelectric bimorph adopts both ends to prop up asymmetric centre gripping admittedly, can reach the purpose that the driver did not have when moving back under the cooperation of two signals.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention;
fig. 2 is a schematic top view of the driving part of the present invention;
FIG. 3 is a schematic waveform diagram of signal one and signal two;
Detailed Description
As shown in fig. 1, 2 and 3, the present invention relates to a backspacing suppressing type inertia piezoelectric linear actuator, wherein a piezoelectric bimorph (3) and a piezoelectric bimorph (5) are fixed on a base (6) through a bolt (2), a bolt (two), a bolt (three) and a bolt (four), a nut (1), a nut (two, a nut (three) and a nut (four) are fixed on a base (6), wherein the piezoelectric bimorph (3), the piezoelectric bimorph (5), the base (6) and the clamping block (4), the nut (three) and the nut (5) form a fixed-support asymmetric clamping at two ends, and the base (6) is arranged on a guide rail (7).
The first piezoelectric bimorph (3) and the second piezoelectric bimorph (5) are arranged in parallel.
The utility model discloses on the base (6) is fixed in through bolt one (2), two, three, four, nut one (1), two, three, four and grip block one (4), two, three, four to piezoelectricity bimorph one (3), piezoelectricity bimorph two (5), its centre gripping mode is both ends and props up asymmetric centre gripping admittedly.
The minimum force of the base (6) capable of overcoming the friction forward movement is recorded as F
mAt this time, F
mMaximum friction provided for the guide rail (7); applying a signal I to the first piezoelectric bimorph (3), when the excitation voltage is positive, the first piezoelectric bimorph (3) bends to the short clamping side, and an inertia force F in the opposite direction (toward the long clamping side) is generated
1(ii) a When the excitation voltage is negative, the piezoelectric bimorph one (3) bends to the long clamping side, and an inertia force F in the opposite direction (towards the short clamping side) is generated
2. When F is present
1＞F
2＞F
mBase (6) is at F
1Under the action of the elastic piece, the elastic piece moves forward one step; when F is present
2When acting, due to F
2＞F
mSo that the base (6) willThe backward movement is a small step and therefore the driver will move forward with a back-off occurring. In order to eliminate backspacing, a second signal (the phase difference between the first signal and the second signal is a half period) is applied to the second piezoelectric bimorph (5), and when the first piezoelectric bimorph (3) is excited by the first signal, an inertia force F is generated
2When the piezoelectric bimorph II (5) is excited by the signal II, an inertia force F is generated
3(F
3And F
2Equal in magnitude and opposite in direction), under the cooperative action of the two signals, the purpose of eliminating the backspacing can be achieved.
Claims (1)
1. The utility model provides a backspace suppression formula inertia piezoelectricity linear actuator which includes nut one (1), two, three, four, bolt one (2), two, three, four, piezoelectricity bimorph one (3), grip block one (4), two, three, four, piezoelectricity bimorph two (5), base (6), guide rail (7), its characterized in that: the piezoelectric bimorph I (3) and the piezoelectric bimorph II (5) are fixed on the base (6) through bolts I (2), II, III and IV, nuts I (1), II, III and IV and clamping blocks I (4), II, III and IV, wherein the piezoelectric bimorph I (3), the piezoelectric bimorph II (5), the base (6) and the clamping blocks I (4), II, III and IV form an asymmetric clamping with two fixedly supported ends, and the base (6) is arranged on the guide rail (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921018801.5U CN210053359U (en) | 2019-06-19 | 2019-06-19 | Rollback inhibition type inertia piezoelectric linear driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921018801.5U CN210053359U (en) | 2019-06-19 | 2019-06-19 | Rollback inhibition type inertia piezoelectric linear driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210053359U true CN210053359U (en) | 2020-02-11 |
Family
ID=69398234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921018801.5U Expired - Fee Related CN210053359U (en) | 2019-06-19 | 2019-06-19 | Rollback inhibition type inertia piezoelectric linear driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210053359U (en) |
-
2019
- 2019-06-19 CN CN201921018801.5U patent/CN210053359U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200211 Termination date: 20200619 |
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| CF01 | Termination of patent right due to non-payment of annual fee |